The joke was the juxtaposition of internet memes (specifically lolcats) with the old Thundercats cartoon (or the newer reboot). THAT’S the joke. The individual references were the carrying out of that joke.

It’s fine if you didn’t find it funny but to say that there’s no joke there is just missing the point completely.

Sorry, not convinced. The video was just throwing memes at the wall to see what stuck. If they had put actual effort to incorporating the memes into the video, I would agree with you with respect to the juxtaposition.

But as it stands, the memes are so divorced from the rest of the video you could cut them out and not notice. They had musical stings announcing a caption. The entire action of a scene paused so a Creeper could reference a tired Minecraft meme.